Hokkaido's Classic Souvenir "Shiroi Black Thunder" Celebrates 15th Anniversary with Collaboration Project! Teams up with "Parfait, Coffee, Sake, Sato," the Pioneer of the Shime Parfait Boom, to Launch Limited-Time Shime Parfait in Hokkaido from April 1, 2026
Yuraku Seika Co., Ltd. is celebrating the 15th anniversary of its Hokkaido-exclusive product "Shiroi Black Thunder" with a product renewal and various anniversary initiatives. These include a collaboration with the Sapporo-based parfait specialty store "Parfait, Coffee, Sake, Sato" to offer a limited-time "shime parfait" and special wrapped trains in Hokkaido.
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- 📰 Published: March 30, 2026 at 20:00
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Yuraku Seika Co., Ltd. (Headquarters: Kodaira City, Tokyo; Representative Director and President: Tatsunobu Kawai) is implementing several anniversary initiatives, including a product renewal, to commemorate the 15th anniversary of the launch of its Hokkaido-exclusive product, "Shiroi Black Thunder."
Special Website URL: https://www.yurakuseika.co.jp/shiroi_blackthunder/
Since its launch in 2011 as a Hokkaido souvenir, "Shiroi Black Thunder" has surpassed 200 million units shipped by 2021*1, growing into a new classic Hokkaido souvenir over 15 years. Currently, it is available in various sizes and is cherished as an easy-to-distribute souvenir for many people.
To commemorate this milestone, we are launching a product renewal that evolves its taste, along with several Hokkaido-specific anniversary initiatives. This project embodies our desire for "Shiroi Black Thunder" to continue to be enjoyed by many as "the" Hokkaido souvenir.
The renewed product enhances the rich milk flavor and strengthens the characteristic "crunchy texture" of Black Thunder. Furthermore, the anniversary will be celebrated through special initiatives unique to the 15th anniversary, such as the development of limited-edition menus through a "shime parfait" collaboration with Sapporo-based parfait specialty store "Parfait, Coffee, Sake, Sato," and wrapped trains that can only be seen in Hokkaido.
Through this product, which offers a special and limited-edition feel unique to Hokkaido, please enjoy it as a souvenir for yourself, or as a gift for family, friends, and those you care about.
(*1) Based on in-house shipments from 2011 to 2021
## 15th Anniversary Project Contents
### "Shiroi Black Thunder" Product and Packaging Renewed!
Since its launch, "Shiroi Black Thunder" has been manufactured at Yuraku Seika's Sapporo factory and has been loved by many as a Hokkaido-exclusive product combining Hokkaido ingredients with the taste of Black Thunder. On the occasion of its 15th anniversary, we are undertaking a product renewal, pursuing a special taste unique to "Black Thunder x Hokkaido."
The renewed product features Hokkaido milk in its coating chocolate, and by incorporating newly developed milk-flavored biscuits that spread a gentle milky sweetness, it further enhances the milkiness.
Additionally, the characteristic "crunchy texture" of Black Thunder has been strengthened. By adding harder cocoa cookies in addition to the traditional cocoa cookies, the crunchy texture is further accentuated, improving the eating experience.
With enhanced rich milk flavor and texture, the powered-up "Shiroi Black Thunder" is finished to allow you to enjoy the charm of Hokkaido ingredients and the unique texture of Black Thunder even more.
Special Website URL: https://www.yurakuseika.co.jp/shiroi_blackthunder/
Since its launch in 2011 as a Hokkaido souvenir, "Shiroi Black Thunder" has surpassed 200 million units shipped by 2021*1, growing into a new classic Hokkaido souvenir over 15 years. Currently, it is available in various sizes and is cherished as an easy-to-distribute souvenir for many people.
To commemorate this milestone, we are launching a product renewal that evolves its taste, along with several Hokkaido-specific anniversary initiatives. This project embodies our desire for "Shiroi Black Thunder" to continue to be enjoyed by many as "the" Hokkaido souvenir.
The renewed product enhances the rich milk flavor and strengthens the characteristic "crunchy texture" of Black Thunder. Furthermore, the anniversary will be celebrated through special initiatives unique to the 15th anniversary, such as the development of limited-edition menus through a "shime parfait" collaboration with Sapporo-based parfait specialty store "Parfait, Coffee, Sake, Sato," and wrapped trains that can only be seen in Hokkaido.
Through this product, which offers a special and limited-edition feel unique to Hokkaido, please enjoy it as a souvenir for yourself, or as a gift for family, friends, and those you care about.
(*1) Based on in-house shipments from 2011 to 2021
## 15th Anniversary Project Contents
### "Shiroi Black Thunder" Product and Packaging Renewed!
Since its launch, "Shiroi Black Thunder" has been manufactured at Yuraku Seika's Sapporo factory and has been loved by many as a Hokkaido-exclusive product combining Hokkaido ingredients with the taste of Black Thunder. On the occasion of its 15th anniversary, we are undertaking a product renewal, pursuing a special taste unique to "Black Thunder x Hokkaido."
The renewed product features Hokkaido milk in its coating chocolate, and by incorporating newly developed milk-flavored biscuits that spread a gentle milky sweetness, it further enhances the milkiness.
Additionally, the characteristic "crunchy texture" of Black Thunder has been strengthened. By adding harder cocoa cookies in addition to the traditional cocoa cookies, the crunchy texture is further accentuated, improving the eating experience.
With enhanced rich milk flavor and texture, the powered-up "Shiroi Black Thunder" is finished to allow you to enjoy the charm of Hokkaido ingredients and the unique texture of Black Thunder even more.